Inking mechanism



Feb. 4, 1930.

c. A. FREDERICKSQN INKING MECHANISM Filed Nov. 1, 1927 2 Sheets-Sheet l"HIM lllflliu lliliflilb II I C. A. FREDERICKSON Feb.4, 1930.

' INKING MECHANISM Filed NOV. 1927 2 Sheets-Sheet 2 mam:

mvznrroa A'r'rvs ddE i Patented Feb. 4, 1930 UN TED STATES PATENT OFFHIECHARLES A. FREDERICKSON, 0F MOUNT VERNON, NEW YORK, ASSI GNOR TO B. HOE&

7 (10., INC., 013 NEW YORK, N. Y., A CORPORATION OF NEW YORK I INKINGMECHANISM Application filed November 1, 1927. Serial No. 230,241.

' This invention relates to certain improve- 'ments'ininking mechanismfor printing machines.

In certaintypes of inkingmechanisrn there is providedadistributonusually in the form of a cylinder or roll, which runs atpress speed incont'actfwith the form cylinder of the Tpre ss. Thisdistributor is inked by a transfer roll which moves betweenthedistributor and arfountain roll located in an ink fountain.

'This fountain roll is given an advancing riod of rest and, asthetransfer roll is running at or close to'the speed of the distributorroll, this contact is apt to unduly speed up'the fountain roll so thatthe fountain roll Will feed, too much ink. i I g It is thespecial Objectf' he present invensome provide a mechanism for preventing the speedingup of thefountain roll through its contact with the rapidly runningtransfer roll, this being effected automatically.

employed for braking the'fountain roll at the proper time.

-'W.'th these and other objects not specifically referred to in'vi'ew,the invention consists in certain novel parts, arrangements and Icombinations which will be described in connectionwith the accompanyingdrawings and the novel features-pointed out in the claims hereuntoannexed. V In these drawings,

Figure 1 is an end elevation of so much of an'inking mechanism,-with theimproved roll retarding devices applied thereto, as is necessaryfor anunderstanding of the lnvention; Flgure 2 is a detall plan view, partlyin section, of the construction shown in Figure 1, looking in thedirection of arrow 2 of that figure;

Figure 3 is a detail'end view showing a modificatlon, and" v Figure 4'is aside view of the construction shown in F lgure 3, 1n directionofarrow 4.

Referring now to these drawings and first to Figures 1 and 2, which showthe invention in its preferred form, the inking mechanism will include adistributor 1 mounted on a shaft 2 suitably supported in framing 3, thisdistributor acting to deliver ink to the form member of a printingcouple, not illustrated.

In the inking mechanism illustrated the ink supply is maintained in anink fountain [I in which is mounted a fountain roll 5 whlch isintermittently operated to feed ink through connections hereinafterreferred to. Ink is delivered from this fountain roll 5 by a transfer orductor roll 6 which moves between thefountain roll 5 and thedistributor 1. In theparticular construction illustrated, this movementof the roll 6 is a vibratory movement, the roll oscillating between thedistributor and the fountain roll. This roll is oscillated in anysuitable manner, as by being carried in arms 7 on a rock shaft 8, thisrock shaft being rocked by a cam roll 9 supported in arms 10 fast on theshaft 8, this cam roll being actuated by a cam 11, which is rotatablymounted on a shaft 12. This shaft 12 is driven by a worm wheel 13 from aworm 14 on the shaft 2 of the distributor 1, before referredto, theshaft 12 being suitably supported in a housing 15 supported from theside frames 3.

The distributor 1 runs at the speed of the form cylinder, that is, pressspeed, and this speed is relatively high, and the ductor roll in comingin contact with the distributor 1 is brought up'to this relatively highspeed. The fountain roll 5, however, runs at a very much lower speed andit is desirable that this low speed be maintained during the operationofthe mechanism. In accordance with the invention, therefore, means areprovided the transfer roll comes in contact therewith,

such time being the period of rest of the fountain roll.

In the particular construction illustrated, the fountain roll isintermittently driven by a ratchet 1.6,which is keyed by a key-17 to theshaft 18 of the fountain roll. This ratchetis operated by a pawl 19pivoted at 20 to an arm 21 loose on the shaft 18. This arm 21 isoperated by a crank pin 22 carried on the face plate23 on the shaft 12,before referred to, by means of a link 24am a ball joint 25 secured tothe arm. The forward feeding movement of the fountain roll at eachmovement of the arm 21 is controlled by means of a pawl cam 26, whichcanbe ad-.

7 when in contact with the transferroll, but in the particularconstruction shown a simple and effective means is a brake which engageswith a drum on the end of the fountain roll shaft. As shown, this shaft18, at its end, is provided with a drum 33 over which is passed a brakestrap 34:. One end of this brake strap is secured to a bracket 35,andthe other end of this strap is provided with an adjusting screw 36and an adjusting nut 37. .Ar-

ranged to contact with this adjusting screw is an abutment in the formof a lug 38 which is secured to the arm 21, before referred to, theparts being arranged so that the lug engages the screw and tightens thebrake strap when the parts are in the position shown in Figure 1, thatis, when the pawl is in retracted or non-feeding position and thefountain roll 5 is at rest. When, however, the arm 21 is rocked forwardby the crank mechanism to effect a feeding movement of the ,"fount-ainroll 5', the lug is moved out of engagenient with the-screw 36 and thebrake released, so that the fountain roll may have the desired freedomof rotation during this feeding movement 7 The parts are so timed thatthe transfer of ductor roll 6 comes incontact with the fountain roll 5when the latter is in non-feeding brake straps retarding the unduerotation of the fountain roll during this'c'ontact of the parts. As,however, the transfer roll 6 moves to contact with the distributor 1,the pawl is brought into feeding engagement with the ratchet to effect aforward movement of the fountain roll '5, and the brake at this time isreleased. 1

In Figures 3 and l a slight modification of the construction abovedescribed isshown.

In this construction one end of the brake band is fastened or anchoredas in the construction of Figures 1 and 2,'but the other end is carrieddirectly on the arm 21 instead of being operated by the lug, as abovedescribed.

While the invention has been shown and described in its preferred forms,it vwill be understood that certain variations may be made in the formand arrangement of the parts of the braking or retarding mechanism shownwithout departing from the invention as defined in the appended claims.

IVhat I claim is: f V 1. In'an' inking mechanism, the combina- I tion ofa distributor, an ink fountain, afountain'roll running at a lower speedthan-the distributor, a transfer roll taking ink from the fountain rolland delivering it to the distributor, and a friction brake for'automati-V cally and intermittently preventing the speedroll is in contacttherewith.

H 2. In an inking mechanism, the combina a friction brake for thefountain roll, and means for actuating. the brake to retard the fountainroll when the transfer roll is in contact therewith.

3.7Ii1 an inkingmechanism,,the combiner tion of a distributor, an inkfountain, a fountainroll running; at a lower speed than the distributor,atransfer roll oscillating between the fountain roll and thedistributor, apawl and ratchet for advancing the fountain roll with anintermittent movement, means for operating the pawl, braking means forthe fountain roll, and means vactuated from the p of he fountain rollwhen the traIlSfe T pawl operating means for tightening andreleasing thebraking; means.

' 4. In an inking mechanism, the combina-' tion of-a distributor, an inkfountain,a foune tain roll'running at'a lower speed. than thedistributor, atransfer roll oscillating between the fountain roll andthe distributor,

a pawl and ratchet for advancing thefoiina tain roll with anintermittent movement, an

arm for operating the pawl, a friction brake for the fountain roll forstopping the fountain roll when the transfer roll is in contacttherewith, and connections between the arm position and takes the inktherefrom, they and the braking means operating to brake the fountainroll when the transfer roll is in contact therewith and'to release thebrake when the arm is operated to advance the, pawl. j 5; Inaninkingmechanism,thecombination" tain roll tightened when the roll isstationary and-released when it is advanced.

.. 6. In an inking mechanism, the combination of a distributor, an inkfountain, a

' fountain roll, an oscillating transfer roll, an

operating shaft, a cam for oscillating the 'Jtransfer roll, a crankoperated from the shaft, an arm operated by the crank, a pawland ratchetadvanced by the arm for advancing m the fountain roll with anintermittent motion,

and a brake strap actuated by the arm to retard and release the fountainroll.

7 In an inking mechanism, the combination of adistributor, an inkfountain, a foun- 5 'tain roll, an oscillating transfer roll, a pawl andratchet for advancing the fountain roll, a -:an arm for operatingthepawl, a brake strap for the fountain roll anchored at one end, anadjustable member on the other end of the strap, and means on the armengaging the I member to tighten the strap. 8. In an inking mechanism,the combination of a distributor, an ink fountain, a fountainroll, atransfer roll oscillating between 5 the fountain roll and thedistributor, a pawl and ratchet for intermittently advancing thefountain'roll, and a friction brake for the I fountain roll acting toretard the fountain roll while the transfer roll is in contact there- 30with and to release the fountain roll when it

